Looking at your DNS settings you have an extra \`A\` record that is pointing to a non-GitHub IP address. You'll need to remove that before GitHub can generate an HTTPS certificate for your site

httpswww.whatsmydns.net/?utm\_source=whatsmydns.com&utm\_medium=redirect#A/designed-environment.com
How do I fix this issue? I contacted the supplier of my domain, go daddy where I was told to check and find the correct GitHub page IP address to then update in the DNS settings
Get cloudflare to front it. They provide https to your http site.